package _3域对象;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet("/TestServlet7")
public class TestServlet7 extends HttpServlet {
	@Override
	protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		resp.setContentType("text/html;charset=utf-8");
		PrintWriter pw = resp.getWriter();
		
		ServletContext sc = getServletContext();
		
		// 先取出之前的数据
		Integer count = (Integer)sc.getAttribute("count");
		if(count==null)
		{
			count = 0;
		}
		// 数量+1
		count++;
		// 保存进去
		sc.setAttribute("count", count);
		
		// 显示
		pw.print("访问总数:"+count);
		
		
	}

	@Override
	protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
		doGet(req, resp);
	}
}